Nail file



FIG. 1 is a perspective view of a nail file according to my design;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view thereof;

FIG. 4 is an end view thereof;

FIG. 5 is a view of the end opposite FIG. 4;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right side view thereof. 

The ornamental design for a nail file, as shown and described. 